[Bug 1175667] New: "./Setup configure --ghc-option=-optc-Wall" gives "warning: control reaches end of non-void function [-Wreturn-type]"

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1175667

Bug ID: 1175667
           Summary: "./Setup configure --ghc-option=-optc-Wall" gives
                    "warning: control reaches end of non-void function
                    [-Wreturn-type]"
           Product: Fedora
           Version: rawhide
         Component: ghc-rpm-macros
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail],
                    [e-mail]

Description of problem:
After adding CFLAGS to %cabal_configure build.log's now include

+ ./Setup configure --prefix=/usr --libdir=/usr/lib64
--docdir=/usr/share/doc/cabal-rpm '--libsubdir=$compiler/$pkgid'
'--datasubdir=$pkgid' --ghc --enable-executable-dynamic '--ghc-options=
-optc-O2 -optc-g -optc-pipe -optc-Wall -optc-Werror=format-security
-optc-Wp,-D_FORTIFY_SOURCE=2 -optc-fexceptions -optc-fstack-protector-strong
-optc--param=ssp-buffer-size=4 -optc-grecord-gcc-switches -optc-m64
-optc-mtune=generic  -optl-Wl,-z,relro'
Configuring cabal-rpm-0.9.2...
/tmp/18846.c: In function 'foo':
/tmp/18846.c:1:1:
     warning: control reaches end of non-void function [-Wreturn-type]
     int foo() {}
     ^

This caused by -Wall and something in Cabal I guess.
Grepping the Cabal source only shows up:

./Distribution/Simple/GHC.hs:362:               hPutStrLn testchnd "int foo() {
return 0; }"

Version-Release number of selected component (if applicable):
ghc-rpm-macros-1.2.17-1.fc21
ghc-rpm-macros-1.3.9-1.fc22

Steps to Reproduce:
1. build Fedora Haskell package Cabal-based package

Actual results:
:
warning: control reaches end of non-void function [-Wreturn-type]
:

Expected results:
no warning

Additional info:
Should probably report this upstream.

It can be reproduced by:

./Setup configure --ghc-option=-optc-Wall

[Bug 1175667] "./Setup configure --ghc-option=-optc-Wall" gives "warning: control reaches end of non-void function [-Wreturn-type]"

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1175667

--- Comment #1 from Jens Petersen  ---
Looks like this is fixed with Cabal-1.18 (ghc-7.8.3+)
but happens with ghc-7.6.3 Cabal.

[Bug 1175667] "./Setup configure --ghc-option=-optc-Wall" gives "warning: control reaches end of non-void function [-Wreturn-type]"

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1175667

Jens Petersen  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|rawhide                     |21

--- Comment #2 from Jens Petersen  ---
Moving to F21 since this will not affect ghc-7.8.

[Bug 1175667] "./Setup configure --ghc-option=-optc-Wall" gives "warning: control reaches end of non-void function [-Wreturn-type]"

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1175667

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |MODIFIED

[Bug 1175667] "./Setup configure --ghc-option=-optc-Wall" gives "warning: control reaches end of non-void function [-Wreturn-type]"

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1175667

--- Comment #3 from Fedora Update System  ---
ghc-rpm-macros-1.2.18-1.fc21 has been submitted as an update for Fedora 21.
https://admin.fedoraproject.org/updates/ghc-rpm-macros-1.2.18-1.fc21

[Bug 1175667] "./Setup configure --ghc-option=-optc-Wall" gives "warning: control reaches end of non-void function [-Wreturn-type]"

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1175667

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|MODIFIED                    |ON_QA

--- Comment #4 from Fedora Update System  ---
Package ghc-rpm-macros-1.2.18-1.fc21:
* should fix your issue,
* was pushed to the Fedora 21 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing ghc-rpm-macros-1.2.18-1.fc21'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2015-0932/ghc-rpm-macros-1.2....
then log in and leave karma (feedback).

[Bug 1175667] "./Setup configure --ghc-option=-optc-Wall" gives "warning: control reaches end of non-void function [-Wreturn-type]"

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1175667

--- Comment #5 from Fedora Update System  ---
ghc-rpm-macros-1.2.19-1.fc21 has been submitted as an update for Fedora 21.
https://admin.fedoraproject.org/updates/ghc-rpm-macros-1.2.19-1.fc21

[Bug 1175667] "./Setup configure --ghc-option=-optc-Wall" gives "warning: control reaches end of non-void function [-Wreturn-type]"

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1175667

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ON_QA                       |CLOSED
   Fixed In Version|                            |ghc-rpm-macros-1.2.19-1.fc2
                   |                            |1
         Resolution|---                         |ERRATA
        Last Closed|                            |2015-02-20 03:33:39

--- Comment #6 from Fedora Update System  ---
ghc-rpm-macros-1.2.19-1.fc21 has been pushed to the Fedora 21 stable
repository.  If problems still persist, please make note of it in this bug
report.